If you test his component, you can click on “upload external .swf” or something like that, and it loads a movie as the background.

I am guessing that they are just taking a movie that they created in Premiere or Final Cut, and import it as frames in Flash (with the resolution set way down), and then set the frame rate to 15 or lower, probably. Just my guess. I dont know how to set it as the entire background, though.

I dont know exactly how its done, but look for a full browser video background on here…there is a few of them up for sale…I know on the site you linked to its just a video loaded as the background. With some semi-transparent pattern overlayed and tiled. I am assuming the only reason for the tile overlay is to reduce the obvious low quality of the video.

Its something I have noticed…full screen video backgrounds in flash need to be compressed sooooo much to retain a small file size and fast load times, that the quality is usually sacrificed, and I’m guessing the pattern is an attempt to mask this.

If the question is “how do create the dots overlay, that is shown on the video?”, then that could be done in After Effects, but it also could be done in pretty much any video application that allows for layers. Its just a pattern layer over a video layer. My guess since it scales without distorting the dots, is that the pattern overlay was done in Flash, and the video is just video shot with a camera, and converted to FLV .

If the question is “How to make a full browser flash background”, then google just that, and you will find a bunch of answers explaining the process.